Constants for normalization modes.
For details about standard Unicode normalization forms
and about the algorithms which are also used with custom mapping tables
see http://www.unicode.org/unicode/reports/tr15/

Enum Constant Detail

COMPOSE

Decomposition followed by composition.
Same as standard NFC when using an "nfc" instance.
Same as standard NFKC when using an "nfkc" instance.
For details about standard Unicode normalization forms
see http://www.unicode.org/unicode/reports/tr15/

Status:

Stable ICU 4.4.

DECOMPOSE

Map, and reorder canonically.
Same as standard NFD when using an "nfc" instance.
Same as standard NFKD when using an "nfkc" instance.
For details about standard Unicode normalization forms
see http://www.unicode.org/unicode/reports/tr15/

Status:

Stable ICU 4.4.

FCD

"Fast C or D" form.
If a string is in this form, then further decomposition without reordering
would yield the same form as DECOMPOSE.
Text in "Fast C or D" form can be processed efficiently with data tables
that are "canonically closed", that is, that provide equivalent data for
equivalent text, without having to be fully normalized.
Not a standard Unicode normalization form.
Not a unique form: Different FCD strings can be canonically equivalent.
For details see http://www.unicode.org/notes/tn5/#FCD

Status:

Stable ICU 4.4.

COMPOSE_CONTIGUOUS

Compose only contiguously.
Also known as "FCC" or "Fast C Contiguous".
The result will often but not always be in NFC.
The result will conform to FCD which is useful for processing.
Not a standard Unicode normalization form.
For details see http://www.unicode.org/notes/tn5/#FCC

valueOf

Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
not permitted.)